TIME-RESOLVED EMISSION CHARACTERISTICS AND TEMPERATURE PROFILES OF LASER-INDUCED PLASMAS IN HELIUM

被引：43

作者：

JOSEPH, MR ^{[1
]}

XU, N ^{[1
]}

MAJIDI, V ^{[1
]}

机构：

[1] UNIV KENTUCKY,DEPT CHEM,LEXINGTON,KY 40506

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 1994年 / 49卷 / 01期

关键词：

D O I：

10.1016/0584-8547(94)80158-4

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The characteristics of laser-induced plasmas vary greatly with the composition of the analyte in the focal volume region. The plasma size, stability and emission properties change with any alteration of the pressure, concentration or phase of the plasma medium. Choice of a buffer gas suitable for laser-induced plasma studies involves examining the spectral interferences, plasma energy, collisional quenching, as well as efficiency of energy transfer as observed by signal enhancement. The emissions in the ultraviolet and visible region resulting from the formation of laser-induced plasmas in helium at various pressures, without a solid target, as well as on the surfaces of aluminum and copper are examined. The time-resolved emission spectra and electronic excitation temperature profiles are presented. These results are then compared with those produced in argon.

引用

页码：89 / 103

页数：15

共 36 条

[1]

Adrian R., 1984, J PHYS D, V17, P1915

[2]

BASHKIN S, 1979, ATMOIC ENERGY LEVELS, V1, P8

[3] EVALUATION OF A MICROWAVE-INDUCED PLASMA IN HELIUM AT ATMOSPHERIC-PRESSURE AS AN ELEMENT-SELECTIVE DETECTOR FOR GAS-CHROMATOGRAPHY [J].